Carburetor



Nov. 2o, 1934. I W- H, WEBER 1,981,483

CARBURETOR Filed Dec.l 3l, 1929 4 Sheets-Sheet 1 NCIV.y 20, 1934. W, HWEBER 1,981,483

' CARBURETOR Filed Dec. 51, 1929 4 Sheets-Sheet 2 W. H. WEBER Nov'. zo,1934.

CARBURETOR 4 Sheets-Sheet 3 Filed Dec. 3l, 1929 Nov. 20, 1934.

W. H. WEBER CARBURETOR -Filed Dec. 5l, 1929 4 Sheets-Sheet 4 themed Nov.zo, 1934- 1, S)81,1 48.

i' CARBURETOR.

Walter 1I. Weber, Detroit, Mich., assigner to Detroit LubricatorCompany, Detroit, Mich., a corporation of MichiganA.vlllllicationDecember 31, 1929, Serial No.41'7,609 '37 Claims. (Ul:mii-34) My invention relates to new and useful imshowingfrom left 'toright the relative positions provements in carburetors for supplying aVconfof certain ports `and passages during operation bustibl'e charge tothe cylinderl or cylinders of an of the modiflcation of Fig. 9.

' internal combustion engine. f Referring to the drawings by charactersof 5 In such carburetors it has been found that a reference, 1designates, generally, a carburetor, 60

combustible charge having the proper ratio ofy preferably of metal, andcomprising abody memliquid fuel to air, to be economical for normal berof hollow construction having air and fuel l operating conditions, doesnot lprovide the inlets and including a base member 2 and a requisiteratio of liquid fuel to air for quick startthrottle body member 3. Themember 2 has a ing, Athe Warmingfup" period, rapid accelerabottom wall ifrom which rise substantially par- 65 tion, and high power demands ofthe engine, allel side walls 5, 6, respectively,`and end wallsparticularly when employed to drive a motor ve- 7,8, respectively, whichjoin the walls 5, 6. Interhicle. L mediate the walls 7, 8 is a partitionor wall mem- An object of* my invention is, therefore, to ber 9`whichextends transversely between and provide a barburetor which will operateeffijoins the walls 5, 6. 'Ihe substantially rectangu- 70 ciently tosupply a proper combustible charge lar' spacel defined by walls 5, 6, 8and 9 comto the engine for all periods and( conditions of prises anairinlet chamber 10 which is supplied its operation. i with air,preferablyatmospheric, by an air inlet Other and further objects andadvantages of passage or conduit Il which opens through the a carburetorembodying my invention will apend wa1l 8 and which is preferablysubstantially 75 pear hereinafter in the detailed description ofcylindrical.. The entrance to passage 11 is prefstructure4 and operationthereof. erablyguarded by means of a deiiectorf plate or The inventionconsists in the `.improved conbaflle 12 rigidly supportedin overlyingspaced v struction and combination of parts and their relation to themouth of passage 11 by a bracket ageroupment in Operative relation, tobe more member 13 nxed to member 2 by screws or the 80 fully describedhereinafter, and the novelty of like 14. The end wall 7 is preferablycurved horiwhich will be-\particularly pointed outl and diszontally anddefines with walls 5, 6, 9 and bottom ti'nctly claimed. wal14 a floatchamber or fuel reservoir v15. With- In the accompanying drawings, to betaken in chamber-d5 is a vertical bracket 16 (Figs. 2 as 'part of thisspecification, I' have fully and and 5) integral with and extendingoutward from 85 clearly illustrated a preferred embodiment of wa11` 9,upward from wall 4, and terminating bey, my invention and certainmodiflcations'thereof, low the top of chamber l5. Between bracket 16 lin which drawingsand side wall 5,'is an internally threaded vertical yFigure 1 is atop plan view, withncertain parts sleeve 17,'the bore ofwhich opens vthrough an broken away, of a carburetor of my invention;aperture 18 in wal14. Depending from the under 90 Fig. 2 is a view ofthe carburetor in front eleside of bottom wall a and concentric withapervation, partially i :vertical central section and ture 18, is aflange 19, preferably circular.

hai/ills Darts'bioken away: j. Threaded into sleeve 17v through aperture18, is Fig. 3ds a v1eW in end elevation looking from a stud 20 having inits upper end an axial bore 4Q Vthe left toward the'rlght 0f Flg- 1; 21opening into atransverse passage 22 through 95 Fig. 4 is a view in endelevation, partially in said stud and within flange 19. on the stud. 2osection on line 0f' Fig. 1.Y and ShOWng :in` lis a cup-like member 23having an aperture 24 ldotted lines the-full 'open4 position of certain/inits bottom wall through which the ,stud 20 vane members; v projects.Between the rim of member 23 and the Fig. 5 is a view in end elevationand in section under face of flange 19 is held the periphery of a 100 onthe line 5-5 0f Fig- 2: strainer element 25, preferably a screen of fineFigs. 6, and 8 are detail sectional views on wire mesh, which surroundsthe stud 20. The

thelhe .'r-r 0f Fg- 2, ShOWng the relativ D0 element 25 and member 23are clamped tightly in sitions of certain ports and passageways duringposition against flange 19 by a cap nut 26 thread- Opelatn; ed on thefree end of stud 20. The member 23 105 Fig. 9 is a detail View inYvertical central sechas a fuel inlet 27 through the bore of anextertion of a modification of my invention, and nally threaded nipple28 for connection of the Figs. l0, 1l and 12 are horizontal group,detail carburetor to a source of fuel supply. Threaded views on thelines 10-10, 11-11 and l2-12, reinto the top of sleeve 17 is a valveguide and seat i5 spectively, of Fig. 9, each horizontal row or groupmember 29 having a vertical bore 30 therethrough llo collar member 35secured thereon and engaged by the arms ofta yoke 36 carried by the endof a float -lever 37 lwhich is pivotally supported on a `pin 38extending between and secured in apertures in bracket 16 and wall 5 seeFigs. 1 and 2).

.8, 9 (Figs. 1 and 2)'.

Secured rigidly on the free end of lever 37 is a oat 39 for controllingthe valve 33 and the admission of fuel to the reservoir 15. A coverplateor member 40-over1ies and closes the reservoir, and is 'preferablysecured tothe `member 2 by screws 41, 41". In order to maintain air atatmospheric pressure overlthe liquid in thereservoir, the cover member40 is provided with an' air inlet 40"I formed by indenting the undersidef of said cover member/ to form a passage. over the edge of the wall9.

I will now describe means for admitting and controlling the main supplyof air and fuel to form the main charge or mixture to `be supplied bythe carburetor: Extending between walls 8, 9 and adjacent andsubstantially parallel to front wall 5, is a shaft 42 having itsopposite ends supported in' bearing recesses 43 in the top faces ofwalls 8, 9. Adjacent and substantially paral-4 lel to the rear wall 6`is a shaft 44 which extends between and has its opposite ends supportedin bearing recesses in the top ,faces ofwalls Journalled on shafts 42,44 are the/ hub portions 46, 47, respectively, of vane oi' air owcontrol members 48, 49, which .are substantially rectangular' in planoutline.

The members 48, 49 have head portions 50, 51 which are substantiallyrectangular andwhich meet substantially in the ve tical plane throughthe longitudinal center line f passage 11. Joining the head portions andthe .hub portions of members 48, 49 are plate portions 52, 53,vrespectively, the under surlaces of which are inclined upwardly from thehorizontal at substantially forty-live degrees, when members l48, 49 arein closed position (Fig. 4). Seated ori the top faces of walls 5, 6, 8and 9 is a plate member 54 which overlies and'closes the `recesses 43,45A and` serves as a top bearing face for the ends of the shafts 42, 44,and to retain the shafts in position. Through the members 54 is' asubstantially; rectangular opening 55 which from front Ato rear issubstantially equal to the distance between Walls 5 and 6 and from sideto side issubstantially equal to but slightly greater than the width bfmembers 48, 49, so that the members 48, 49 project movably therethrough.From member 54 at the sides of the opening 55 and adjacent walls 8, 9,rise substantially parallel guide plate mem' bers 56, 57-, respectively,which are spacedapart a distance substantially equal to' but slightly-greater than the width o f vanes 48, 49, and which terminate at` aheight substantially equal to the length of said vanes when the latterare in full open position, as shownV in' dotted lines (in Fig. 4. On theinside faces ofthe members 56, 57 are deector members' 58,- 59,respectively, which 'lie under the vane members 48, 49 (see Figs. 2 and4) andlwhich are inclinedjupwardly toward each other from the bottomedge of the opening55, the inclination ofmember 58 being preferablyabout twenty degrees and of member 59 about ten degrees. The side edgesof each of members 58, 59 are inclined upwardly toward each othersubstantially parallel to the under faces of the vane members 48, 49when the members 48, 49 are in closed position. In the meeting faces ofthe head portions 50, 51y of the vanes; midway between members 56, 57are VerticaLsbmi-cylindrical, oppositely positioned recesses 60, 61,which cooperate when portions 50, 51 are in engagement, to provide acylindrical aperture 62 therethrough. In the air inlet chamber 10 andsubstantially concentric with aperture 62, is a sleeve member 63 whichrises vertically from the bottom wall 4 substantially to the height ofthe chamber 10 -(see Fig. 2). Vertically through the sleeve mem. ber 63,Wall 4 and a bossy 64 depending from wall 4, is a cylindrical bore 65which is concentric with aperture 62, substantially the top third ofsaid bore being-of reduced diameter, as at 66, toserve as a guideway andtoprovide a downward facing annularl shoulder 67 forming the top wall ofva dash-pot chamber 68. Extending between wall 9 and sleeve member 63 isa horizontal boss` 69, and through the Wall 9, boss 69, and the wall ofsleeve member 63, isa fuel supply conduit 70A which opens at one endintothe reservoir 1 5 and at its other end into the bore 65 beneath the'dash-pot chamber 68. Irthe chamber. 68 is a piston 71 of slightly lessdiameter than the diameter of chamber 68 to provide for a flow clearancearound the piston. Rigid with said piston and extending upwardcenti-ally therefrom,is a

rod 72 which extends above sleeve member 63,

as at 73, and is of a diameter substantially equal to the diameter of"the\sleeve guideway portion 66, but which has a free sliding t therein.Longitudinally through the`piston` 71 and rod 72 is `a fuel feedpassageway 74. `.On the portion 73 of rod 72 and movable therewith, issecured a nozzlemember 75 having a depending skirt o r flange 76surrounding the guideway portionl66 and in\ which is a circumferentialrecess 77. 'Extending from `the under. faces of the vane members 48, ,I

49 are arm or lever members 78 which incline downward at an angle ofsubstantially twentytwo and one-half degrees to the horizontal, andl4the free ends of which seat loosely at substantially opposite points inthe recess 77 to forman operati've connection between the vanes and saidnozzle 75, The-nozz1e 75 extends upward intoap" erture 62 ywith adiametral clearance, preferablyof about one-sixteenth of an inch, so asto provide an annulark air ow space 78 there-- connected with passageway74 by a bore or'pas- -1 sage 80 coaxial therewith and forming the mainfuel jet. The member 75 may also beprovided with one for more air bleedports 81 which .open from beneath. the vane members into the cup orrecess 79 adjacent bore 80. Within the dashpot chamber 68- is`a spring82;l preferably of the coil type, which-surrounds rod member 72 andwhich is heldunder compression between shoulder- 67. and piston 71 toaid the piston 71 in resisting opening movement of vane members 48, 49and lifting of nozzle 75, and also to return the 1 vanesfandnoz'zletowardlower position. Thread,- ed into the bore 65 in boss .64', 'is'theupper end of hollow guide member-88 having'a transverse; upper end wall84 vvthrough which is an aperture l 85 concentricl with pistonpassageway 74. Ad#

. justably threaded-into member 83, as at 86, is a.

valve stem'y 87 which depends below member 83, and has a hand gripmember` 88 for manualad- I justment of the s tem 87. In the top` end ofstem 87 is a cylindrical recess 89 in which is seated for lateral andlongitudinal play,'thefflanged end 90 of a tapered metering pin 91 whichextends upward loosely through aperture 85 and into passageway 74for'cooperation therewith to determine the size of the main'fuel inlet.'Ihe pin 91 is secured to the stem 87 by an annular member 92 whichoverlies the periphery of the flange 90 and which is fixed to thestem-for example, by staking or crimping the stem over onto the member92. The member 8311s enlarged belowy the threaded portion' 86 to provideanpannular packing recess 93 aroundstem 87, and in which is packing 94.A packing nut or gland 95 threadedv into member 83 and\surrounding stem87, serves to maintain packing 94 tightly'in position, The gland 95 ispreferably provided with a lock nut 96.

The throttle body member 3 seats upon the plate member 54, and at itslower end is substantially rectangular in horizontaly section, as at 97,merging above the tops of guide members 56, 5'? into a hollowcylindrical portion, as at 98.

The members Zand 3 are rigidly securedftogether with the plate member 54clamped therebetween, preferablyby meansof bolts 99, or the like, passedthrough flanges 100 projecting from'walls 5, 6 and through member 54 andthreaded into overlying flanges 101 projecting from member 3. Within theportion 98 is a 110W control member or throttle valve 102, preferably ofthe butterfly type, carried rigidly-pn a shaft 103 journaled atdametrically opposite points in the wall of por- 'tion 98 and having itsaxis preferably in the vertical plane through the longitudinal centerline of passage 11. One end, as 104', of shaft 103 projects throughthewall of portion 98 and extends over the reservoir 15. The spacewithin member 3 below valve 102 and above members 48, 49, constitutes avmixing chamber. 105, and above the valve 102 is .the outlet 106 for themixing chamber or carburetor, and in which is a series of continuous,parallel, circumferential grooves 107 which aid in homogenizing the mixture passing from the` outlet 106.

The foregoing describes the invention' so far as it relates to the mainfuel and air provisions for forming an explosive mixture in.` the mixingchamber of the carburetor. I will ,now describe `the invention so far asit relatesfto certain means for cooperation with the structure abovedescribed, in order tofprovide a proper explosive charge required forproper operation of an engine under certain conditions, for` example,starting, warming-up, acceleration, and high power demands, etc.: I 1LPositioned over the space between bracket 16 and wall 6, is a valvecasing member 108 having a vertical, Substantially cylindrical bore 109therethrough. The casing 108 ,is preferably formed integral with thethrottle body 3,*being secured thereto' by conduit .memberspllg' 111.The member 110 (see Fig. 2) extends between' the lower end ofcasing 108and throttle body portion 98, and\has a substantially horizontal bore112 therethrough which opens at one end into casing bore 109, and at itsother end 'into the mixing chamber 105 anterior of. the throttle, andhaving its longitudinal axis substantially coincident with the line ofcenters of bore 109'and the` mixing chamber. Within the bore 112 issecured a nozzle member 113 which projects into the mixing chamber 105and has a horizontal` dischargepassage 114. 'I'he member 111 extends 116of member 111. The'b'ore 116 is upwardlyv and rearwardly inclined andopens into the outlet 106 above or posterior of the throttle- 102, as at11'?. The passage 115 and bore 116 together comprise the upperportion.of the carburetor priming or starting passage.

Concentric with bore 109. is a circular aper-` ture 118 (see Figj)th'rough the cover 40, and positioned in said apertureis a-sleeve member119 having at its top a circumferential supporting flange 120 restingupon cover 40. The pe' riphery of. flange 120 is notched,"as at 121 (seeFig. l), for cooperation with cover member retaining `screw 4'1at toprevent rotation of memben 119. 'I'he member 119 depends into reservoir15 toa point below the normal fuel level, which is indicated by lineL-L. n lFitted in the casing bore 109is the upper end of a hollow,open-ended, cylindrical casing or'housing member 122 which projectsslightly above casing 108, as at 123, and which extends downward throughsleeve member 119 substantially to the bottom wall 4 of the floatchamber. The member 122 is held against vertical movement by a set'screw1228, threaded through member 108. and Aseated at its inner end in acircumferential groove 124 in member 122 to permit free rotation ofmember 122 in the bore 109, so that the portion of member 122 within`bore 109 serves as a rotary valve, as will be presently set forth.Within housing member 122 and,

slightly below bore 112, is a transverse partition (see Fig. 6). Throughthe wall of chamber 126 isaalibrated port.l30 which isslightly largerthan port 129 and is arranged to register with passage 112 uponA.clounterclccl'gwise rotation of member- 122 suiiicient to move passage127 out of cut off'said. passage 1,28. Also through the wall of chamber126 is a prlmingport 131 which,\upon .cqunterclockwis rotation of`member 122\sui. cient to carry port 130 out of communication with bore112, will register with priming passage 115.

-The top of chamber 126 is sealed by a plunger valve member 132 whichupon downward move` A ment covers and cuts olf the port127 and admissionof air to chamber 126 .through said port. On memberu132 which projectsabove member v122, is a gear rack 133, and xed by a set screw 134 onthe'projecting end 104 'of the throttle shaft, is a pinion member 135having gear teeth' 136 meshing with said rack, .so that rotation of thethrottley shaft in moving the throttle toward register with air inletpassage 128 and thereby open and closed positions will reciprocate valvemember'132. On the ycircumference of the member 135 is a lug orprojection 1 3? throughwhch is an internally threaded .aperture 138having its axis transverse to throttle shaft 103, and

being, when the throttle valveisA closed, substantially horizontal andin the plane of the housing projecting portion 123, 'as' 'shown in Fig.5. A

4 I. part of the periphery of portion 123 is formed with a flat face 139which, when the housing member 122 is in normal position and throttlevalve 102" closed, is in line with aperture 138,

the face 139 constituting a cam, yfor a purpose to be presentlydescribed. Adjustably threaded in aperture 138 and projectingtherefrom-into substantial contact with the at fae 139 when the throttlevalve 102 is closed, is apin 140, so

located that upon rotation of housing member 122 the face 139 willengagepin 140, and by a cam action therewith rotate throttle shaft 103 to movethe-throttle valve 102 toward open position. An operating member,preferably in the form of a ring141, surrounds andv is lfixed tohousing'member 122 and rests upon sleeve flange `120, and by means ofwhich, member 122 may be rotated manually. Surrounding member 122between casing member 108 and ring 141, is a coil spring 142 which isunder compression and serves to hom the ring 141 against aange 12o.Projecting from the ring 141 are stop arms 143, 144 which ,cooperatewith .a stop, preferably one of the coverscrews, designated 41, to limitrotation of member 122. -When arm 143 engages the stop 141 (Fig. 6), themember 122 is in normal position, and when arm 144 engages said i tion125 and extending downward in member 122 to la point belowthe normalfuel level in'the float chamber. VLngitudinally through =the member"face of partit'on4 125 substantially at the` time 'downward trav gro .respectively,

the normal 145 is a conduit 147 open at its lower end and communicatingatits up'per end adjacent metriber 132 througndischarge `ports 148 withsaid bhamber 126, and in the wall of member 145 is a calibrated aperture149 which is` normally housed within and closed by partitionv125, but

which is so positioned as to pass below the bottom l of thevalv`e`member 132-closes air inlety port 127. lAlso through the wall ofmember 145 is an air bleed hole .150 which normally opens into chamber126 but which is so positioned that it starts to move into aperture y146a.s member 132 cuts on port 127. Through the sleeve member 119 andmember 122 within chamber y15, and above the-normal fuelulevel in thefloat chamber areair inlet ports 151, 152, which register withI eachother when rotary housing member I122 is in the normal running positionof Figs. 5 and 6, i. e., when port 1291s' in register with passageiiz,but which Vare of such size in a horizontalplane as'to be out ofregister whenr'iortA 130 registers with pasmember-119 is of enlargedinternal diameterto its bottom end, as at 153, to provide an annularfuel conduit from reservoir 15.- Through -the wall Vof rotary membe'r122above the' normal fuel level, is'fafiielinletport'154 which opens fromthe conduit 15'3v into theinterior of'member 122.y The lower portion ofmember 122 which extends below fuel level in'thefloat chamberxis ofenlarged internal diameter to provide a pump Ychamber 155 having itsupper end wall dened by a downward facing annular shoulder 156, landbeing closed at lower end by a .closure member,

preferably in the form of a plug 157 threaded i into member 122. Thelower endl of tubular member 145 ifs of reduced external diameter toprovide a downward facing annular shoulder 158 substantially in theplane of shoulder 156 when the throttle valve is closed. Within chamber1,55 is a pump piston 159 having a depending circumferential iiange 160and a. central aperture 161 into which the reduced end of member 145ex-v tends such that 'shoulder 158 engages the top face of th'e piston.Between plug 157 and piston 159 is a coil spring 162 normally urgingpiston 159 upward against shoulders 156 and 158. Through the plug 157 isa calibrated port 163 coaxial with passage 147.l In the top of plug 157'concentric with port 163, is a cylindrical recess providing an annularvalve seat 164 with which cooperates a disk member 165 serving as acheck yalve to prevent flow from chamber 155 to reservoir 15. The memberor Valve 165 is retained in its recess by a spider or the like 166,preferably secured in position by staking the plug 157 over onto thesame, as at 167. The bottom wall 4 may be provided with a dirtcollectngvchamber 168 positioned beneath member 122 and having aclean-out aperture 169 closed and sealed by a plug 170 threaded orotherwise secured therein.

On the end 104 of throttle shaft 103 beyond pinion 135, is an' operatingmember 171 having a' socket therein coaxial with shaft 103l to receive adrive shaft 172 having'a radial key or lug 173 which extends into aradial slot 174 in member 171. On the member 171 is an arm 175 whichengages a stop lug 176 on the member 3 to limit opening movement' of4the throttle valve. Also on member 171 is an arm 177 having anadjustment screw 178 which cooperates with casingY member 108 Ytoabutthe same to limit closingy movement of the throttle valve.

The operation of the carburetor of Figs; 1 to 8, inclusive, when theoutlet 106has been connected to the cylinder inlets of an internal combustion engine and reservoir/,15 has been connected at inlet 27 to asource of fuel supply, is

as follows: The engine being at rest, and it being desired to start thesame, the ignition is turned on vandthe lever 144 is moved manually from'its 'normal running position, Fig. 6, by counter-elo kwise rotation tothe straining ppsition of Figc when it will abut the cover-retaining andst op screw ,413. This movement will rotate housing member 122, causingthe cam face 139'to' engage pin 140 and rotate the throttle vvalve 102toward open position, corresponding to level road car'speed ofsubstantially fifteen miles per hour. mentioned, closes ports 129, bycarrying them out of communication with the nozzle discharge passage 114and also closes air inlet port 127 by carrying yit out of communicationwith air inlet 128. fThe said rotation of member 122,` howL ever, placespriming or starting port 131'in regtry with priming passage 115, 116 toplace port 117 in outlet 106 above the throttleA valve,indirectcommunication with'the fuel reservoir 15 via passage- 116, 115,port l131, chamber 126, ports `148 conduit 147, chamber 155, andcalibrated port 163. If the engine be now turned over, solid liquid'fuel will be drawn fromreservoir 15 through port 117 to mix in outletpassage 106 with such air as can pass the throttle valve 102 when thesame is in starting position. The

fuel mixture thus supplied to the engine is exl ceedingly rich andconstitutes a priming or starting charge. VIf desiredfthe fuel suppliedfor start- Rotation of 'member 122, as just t30- ing to the outlet 106from port 117 by suction, may be substantially augmented by rapidlyopening and closing the throttle 102, which results in the pump piston159 forcing solid liquid yfuel from the pump chamber 155 up throughconduit 147 and port 117 to outlet 106. As the throttle is opened, airentering chamber from inlet 11 Y(at atmospheric pressure will separatethe vane members 48, 49 swinging them upward and out-f 'ward fromeachother on their shafts 42, 44 toward their full open position,indicated`by dotted lines in Fig. 4. The air passing between the' Vanemembers 48, 49 is directed by the inclined under faces of the Vanemembers and by the deflector members 58,Y 59toward the ,discharge pointfrom the main fuel nozzle 75. vThe vane members 48, 49 will be openedproportionally to the difference in pressure between chambers 10 and105, and the movement of the members' `48, 49 acts through lever arms 78upony nozzle member 75 to simultaneously lift member to maintain thepoint of discharge therefrom substantially in the plane of least flowarea between chambers 10 and 105, i. e., substantially in the planel ofthe top edges of members 48, 49, so that the fuel in the nozzle memberwill be maintaineduin the `plane of greatest air velocity and of maximumaspirating effect. The rate of opening and clos- -ing of Vane members48, 49 is controlledby the piston 71 and spring 82 in the dash-pot 68 soas to prevent chattering of the vane members at low engine speeds. Asthe vane members open and close, they raise and lower nozzle 75 andpiston 71 with respect to metering pin 91 to control thereby the size ofthe main fuel inlet to passage 74 and to automatically increase the fuelfed to the main jet and the mixing chamber las the supply of air to themixing chamber is increased.` The tapered metering pin 91 after initialmanual adjustment, is held in fixed vertical positionl during operationof the carburetor. Should it be desired during extremely cold weatherconditions, and as soon as the engine' is running, to place a load onthe engine or drive lche car, then as the throttle valve is moved beyondone-third full open position; pinion 135 will act on rack 133 and piston125 to carry port 149 below partition 125, and since port 151 is out ofcommunication with port 152, additional fuel will be drawn fromreservoir 15 through annular passage 153 in sleeve 119, port 154, thebore of memberZ2 122 and port 149, into the conduit 147 and thence withthe normal priming or starting charge into outlet 106.

As the engine warms up, the lever 144, which controlsI the quality ofthe mixture,j is manually returned to the-intermediate position of Fig.7 which cuts off the priming port 117 from chamber 126 and places port130 in communication with nozzle discharge passage 114 while air inletport 127 to chamber 126 is still closed, being out of register with airinlet port 128. When the lever 144 is returned to the position of Fig.7. cam139 will permit the throttle valve 102 to return partially towardidling position, but not so` just described, the sub-atmosphericpressure in mixing chamber 105, and the atmospheric pres- .suremaintained over the fuel in reservoir 15 by air" inlet port 40a, willcause liquid fuel to pass from the reservoir l5 through calibrated port163, conduit 147, ports 148, chamber 126, port 130 and.y

passage 114 into the mixing chamber 105. This v liquid fuel from passage114 is supplemental to ber 126 to air inlet 128 through registering portthat from the main jet 80, and increases the richness of the mixturesupplied by the main air and fuel inlets to provide a proper mixturewhen desired-for warming up the engine. As the engine further warms up,the lever 144-is gradually returned manually-to normal running position(Fig. 6) when' stop lug 143 engages screw 4l, thus bringing Iport 129into, communication with the nozzle discharge` passage`114 and openingcham- 127. When housing member 122 is gradually rotated by llever 144from theposition of Fig. 7 to that of Fig. 6, then as' port 127 beginsto admit air to chamber 126, there will be a discharge of air and fuelthrough passage 114, which continues until port 127 has been rotated farenough to f admit sufficient air to chamber 126 to satisfy the mixingchamber suctiony at port 129. When the engine has been warmed up andhousing member 122 returned from the position of Fig. 7 to the positionof Figs. 5 and 6, the mixture of air and liquid fuel Lfor normal runningwill vbe supplied only from the main air inlet 11 and the main fuel J'et80, but some economizing air will enter the mixing chamber directlythrough passages 114 10 froml chamber 126. When the throttle valve 102is gradually dopened, the registering ports 127, 128 will be graduallycut off by downward movement. of plunger valve 132 and will be closedcompletely at substantially one-third open position of the 105i throttlevalve corresponding to about sixty miles per hour level road car speed.As the flow area of registering ports`127, 128 is cut down by valve 132,so that air supplied to chamber 126 will no longer satisfy the suctionat port 129, thenfuel n will be drawn from the reservoir 15 throughconduit 147 to mix in chamber 126 with some air entering ports 127, 128and pass therewith through passage 114 to enrich the mixture from themain air and fuel inlets. been closed completely by valve 132, port 149will have passed below partition and air passing through ports 151, 152from the reservoir will enter port 149 and 'conduit 147 to pass, withfuel drawn up conduit 147 from the reservoir, into'120 chamber 126 aslan emulsion, and thence into the mixing chamber 105 through passage 114to provide a supplemental fuel jet to enrich the mixture from'the mainair and fuel inlets to supply aA proper mixture for maximum powerdemands.

The air inlet port 149 is provided to decrease the with air from ports127, 128 through. passage 114 135 into the mixing chamber to'supplementthe main mixtureitoprovide the desired rich mixture for acceleration.'Ihe check valve 165 prevents any back-flow through port 163 fromchamber 155 into the reservoir 15 and causes all the fuel displaced 140by piston 159 to pass up conduit 147. The fuel from chamber 126 passesto the mixing'chamber 105 through passage 114 and nozzle 113`substantially instantaneouslyfdue to the air at atmospheric pressuresupplied from ports k127, ,128. 145

After discharge of the displaced fuel from chamber 126, no additionalfuel will feedl from nozzle 113,. but economizing air will again pass ftherethrough to the mixing chamber. Upon sudden opening of the throttlevalve 102 beyond sub- 150 When ports127, 128 have 115 stantiallyone-third full open position, or sufils of portsf as it is evident thatother size combiciently to cut off ports-127, 128, an acceleratingcharge of liquid fuel will be expelled from beneath piston 159 up tube147 into chamber 126, check valve 165 preventing back 'flow into thereservoir 15. The liquid fuel forced into chamber 126 passes as a solidslug through passage 114 to the mixing chamber, due to the substantiallyinstansure of theuel in conduit 147 prevents entrance of air throughport 149. This initial discharge of liquid fuel is followed)instantaneously by an emulsion of liquid fuel from the reservoir 15 andair entering conduit A147 through port 149, which emulsion is constantin quantity per unit of time, and which supplies sufficient additionalfuel to the mixture from the main inlets to provide maximum Power.

A l The air bleed 150 is provided to prevent retention of fuel inchamber 126 should the throttle valve be returned toward closed positionjust sufficiently to closeport 149 without.

opening ports `1/2'1, 128. Since 'port 150 is above i partition 125v asport 149 closes, ports 127, 128

remaining closed, air entering the closing `port 149 will pass throughconduit 147 'and issue from The carburetor illustrated in Figs. 9, 10,11 an l 12 is substantially like that of Figs. 1 to 8 inclusive, but.certain details of the structure have -been modified slightly. Thesleeve member 119 has been omitted and also the fuel inlet 154 to theinterior ofhousing member 122, so that in this carburetor the additionalsupply of fuel,.to conduit 14'1 throughport 149 has been eliminated. Theair inlet port` 152v for supplying air to the air 'bleed port 149 hasbeen placed above the float chamber and registers in the normal positionof )housing member 122 with a port 180 in casing 108. The primingpassage 116 has been positioned substantiallyin the vertical plane ofand above the 4nozzle member 113, and therefore opens directly intothebore 109, thus eliminating passage 115. 'I'he port 131 while maintainingits relative circumferential position to the other ports in cas-.4

ing 122, has been placed substantially in the plane of air inlet port127 for movement into and out of registry with passage 116. The ports129,

` 13o instead of being m the same, hbrizonm piane have been spacedlyertically so that the port 130 cooperategwithfa.separate passage 179which is above and in the vertical plane of nozzle member 113, and whichopens from bore 109 into the mixing chamber 105. The port 129 registers,asain Figs. 1 `to 8, in normal position of member 122 with the nozzlebore -114, but the member 113 has a calibrated discharge port 181. InFigs. 10, 11 and 12 are shown certain operative positions of member -122and of the discharge ports from chamber 126, the detail sectional viewsin the right-hand column illustrating the positions of "the ports fornormal running; those in the middle column illustrating the positions ofthe ports upon partial clockwise rotation of member 122, and being theposition for lwarming up ,the engine; and

isfactory, but Ido notlimitmyselfto such sizes nations will alsobeoperative:

Figs. 1 to 8 Figs. 9 to i2 Main fuel iet .085 -.0865 .070 Air inletport... 127 .0937-.125 .0937 Power port 129 .070' .0937 Warming-up por130 .0937 .0625-.078 Primlng port 131 .125 .0937 Port 149 .0595 .043Pump inlet.. 163 .D98 .098 Air inlet. 152 .1875 .0937 Main jet bleed B1052 Fuel inlet.- 154 ,125 Air bleed 150 .'040

What I claim and desire to secure. by Letters Patent of the UnitedStates is:

l. A carburetor of the character described, comprising a body memberhaving a mixing chamber therein, an air vinlet to said chamber, a vanemember normally restricting the passage of air from said inlet to saidchamber, said vane 'member being supported for swinging movement toopenV communication between'said inlet and lsaid chamber, a-movable fuelnozzle discharging longitudinally into Saidchamber and having'its pointof discharge substantially at the `free edgel of said vane member whensaid member is in passage restrictingposition, means interconnectingsaid vane member and said nozzle to cause substantially simultaneousvmovement of said nozzle and said vane member whereby the point ofdischarge from said nozzle ismaintained substantially in the plane ofmaximum air flow velocity,

and means fixed in said air inlet to deflect air entering said chambertoward the point of discharge from said nozzle.

2. A carburetor of the character described, comprising a body memberhaving a mixing chamber therein, an air inlet opening into said chamber,oppositely positioned vane members supported adjacent the sides of saidchamber for swinging movement, said vane members normalv ly engagingeach other at their free edges and being 'movable into parting relationto control ow of air from said inlet to said chamber, par- `allel spacedguide members extending between and laterally engaging the side edges of said oppositely positioned vane members, said vane members having 4anopening therethrough, a reciprocably supported-fuel nozzle positionedwithin said air inlet and terminating in said lastnamed opening, meansto move said nozzle upon swinging movement of said vanemembers wherebythe point of discharge from 'said nozzle is maintained substantially' inthe plane of minimum flow area between said inlet and said chamber,`andy means in said air inlet projecting laterally from said guidemembers on the inlet side of said vane members-to direct lair flowtoward said nozzle.

3. A carburetor of the character described,

comprising a body member having `a mixing chamber therein, substantiallyparallel spaced .guide members in said chamber, an air inlet openinginto saidchamber, vane members posiinlet and said chamber, said vanemembers hav- 'Y ing an opening therethrough at their free edges,

a reciprocable fuel nozzle in said air inlet and, f

terminating in said last-named opening, said nozzle having a dischargeport concentric with' said mixing chamber, one of said guide members Ihaving means to deflect air toward said nozzle, and meansinterconnecting said vane members and said nozzle for substantiallysimultaneous movement thereof whereby the point of discharge from saidnozzle w'ilLbe maintained substantially in the plane of maximum air flowvelocity. j, y

4. A carburetor for supplying a` mixture of fuel and air to an internalcombustion engine, comprising a body member having'a mixture passageway,main air and fuel inlets to said passaigeway, an outlet from saidpassageway, means to control now through said passageway, a supplementalfuel supply conduit communicating at one end with a source of fuelsupply and at its other end opening into said passageway, an air inlettosaid conduit normally operative to supply air tosatisfy the passagewaysuction on said conduit to prevent flow of fuel from said supplementalconduit, a valve operable to regulate said second air inlet whereby thesuction in said i, passageway can/draw fuel through said conduit,

means actuated with said control means for transmitting movement to andfor operating said I valve whereby the supply of fuel from said conduitis determined in accordance with the position of said control means, anda second valve controlling said second air inlet and operableindependently of said first-named valve whereby to control the supply offuel from said conduit independently ofthe position of'said controlmeans and in accordance with the needs of the engine.

E. A carburetor of the character described, comprising air inlet memberhaving an air inlet chamber and an air inlet tojsaid chamber, saidmember having an opening in its wall from said chamber, a throttle bodymember secured to said air inlet member and'having a mixingchambertherein having an open side communicating with said opening, a platemember having anaperture therethrough and being clamped between saidmembers,I substantially parallel guide members in said mixing chamberand projecting from said plate member, inclined vane members positionedtransversely between saidv guide members, said vane members beingsupported by said base member for swinging movement and normallyengaging each other at their free edges and having their sideedges/cooperating with said guide members to restrict flow from said airchamber to said mixing chamber, a tubular guide `means positioned insaid air chamber and includinga dash-pot chamber, a fuel nozzlesupported by said guide means for reciprocation and having a piston insaid dash-pot chamber, and means on said vane members engaging said`-nozzle whereby swinging movement of said 'vane members will move saidnozzle.

6, A carburetor of the character described, comprising a body member.having a mixing chamber, main air and fuel inlets tojsaid chamber, anoutlet from'said chamber, means to control said outlet, aA casingfmemberhaving a cylindrical bore, a valve member having a fluid chamb er andbeing' rotatable in said bore, means to supply fuel `to said fluidchamber, a conduit communicating with said bore and with said mixingchamber, an air inlet to said bore, a plurality of l ports 1n said valvemember, certain of said ports registering substantially simultaneouslywith saidsecond air inlet and with said conduit, another of said .portsregistering with said conduit when said second air inletis closedby'said Valve member, and a piston valve in said fluid chamberoperatively connected to said control means and movable thereby toregulate said second air inlet.`

7. A carburetor of the character described," comprising, a body kmemberhavingy a mixing chamber, main air and vfuel-inlets to said chamber, anoutlet from said chamber, means to control said outlet, a casing memberhaving a cylindrical bore, a valve member having a fluid chamber andbeing rotatable in said bore, means to supply fuel to said iiuidchamber, a conduit communicating with said bore and with said mixingchamber, an air inlet to said bore, a pluralityy of ports in said valvemember, certain of said ports registering substantially simultaneouslywith said second air inlet and with said conduit, another of said portsregistering with said conduit when said second air inlet is closed bysaid valve member, a piston valve in said fluid chamber operativelyconnected to said control means and movable thereby to regulate saidsecond air inlet,

Iand means operable by said valve memberto regulate said control Xmeans.

8. A carburetor ofV the character described,

.comprising a body member having a mixing chamber, main air and fuelinlets to said chamber, .an outlet from said chamber, a pump chamberhaving a fuel inlet, la piston in said 'pump chamber, a casing having afluid chamber having communication with,said mixing chamber, said pistonhaving la piston rod projecting into said fiuid chamber, a conduitextending through said piston and rod from said pump chamber to saidfluid chamber whereby the fuel compressed .beneath said piston will passthrough said piston and rod, the wall of said casing having an air inletp'ort'to said fluid chamber normally operable to supply sufficient airto satisfy the mixing chamber suction thereon, and valve means carriedlby said rod to4 control said air port.

9L A carburetor of the character described,

comprising a body having a mixing chamber, main air and fuel inlets tosaid chamber, an outlet from said chamber, a throttle valve in saidoutlet, a fluid chamber, means to supply fuel to said iiuid chamber, aconduit leading from said fluid chamber and discharging into said mixingchamber on the inlet side of said throttle valve, a second conduitleading from said iiuid chamber and discharging into said outlet beyondsaid throttle valve, means to control fiow through said conduits, an airinlet port to said fluid chamber normally operable to supply air tosatisfy the mixing chamber suction thereon, and means operable by saidthrottle valve to regulate said air port whereby the mixing chambersuction Will draw fuel from said fluid chamber' into said mixing'chamber to supplement the fuel from said main fuel inlet.

10. A carburetor of the character described, comprising a body memberhaving a mixing chamber, main air and fuel inlets to said chamber, anoutlet from said chamber, amember having a cylindrical bore, a valverotatable in said Vbore and having a fluid chamber, a fuel supplyconduit leadingr from said bore to said mixing chamber, a fuel supplyconduit leading from said bore to said outlet, yan air inlet conduit tosaid bore, portsin said valve member registerable with said conduits forplacing said conduits in communication with said fluid chamber, andmeans to supply fuel to said fluid chamber.

l1. A carburetor of the character described, comprising a body, memberhaving a mixing chamber, main air and fuel inlets to said chaml' tosupply fuel to said iluid chamber, .and means to control the portregistering with said air inlet to control thereby the degree of airpressure in said iiuid chamber.

12. A carburetor'of the character described,

comprising -a body member having `a mixing chamber, main air and vfuelinlets to said chamber, an outlet fromsaid chamber, control means forsaid mtlet, a pump chamber, a iiuid chamber, a` piston in said pumpchamber, an

operating member for said piston, said operating member having alongitudinal bore opening at one end through said piston into said pumpchamber and at its other end having communication with said -uidchamber, a conduit from said fluid chamber to said mixing chamber, va

priming'passage from said fluid chamber to said f outlet, means tosupply-fuel to -said pump chamber, means to normally maintainsubstantially atmospheric pressure in said fluid chamber, and

`.. valve means to control said vlast-named means,

said conduit and said primingmassage.

13. A carburetor voi the character described, comprising a bodymember-having a mixing chamber, --main air and fuel inlets to ?said cham- 5(ber, an outlet from Said chamber, control means for said outlet, apump-phamben-ailuid chamber, a piston in said pump chamber,- anoperating member for'said piston, said, operating member having alongitudinal -here openingfia't one end' thigrugh said piston into' saidpump chamber and z-'et'i other end having communication with .said tluidchamber, a conduit 'from saidj'ffiuid chamber to said-mixing cha-mber, apriming-passage from said fluid chamber to said outlet, means 'toy ,5supply fuel to'said pump chamber, means to ndrmally maintainsubstantially atmospheric pressure in said iiuid chamber, valve means tocontrol said last-named means, said conduit and said priming passage,and means operableby said control means to cause sub-atmosphericpressure "in saidgiuid chamber. f

14. A carburetor comprising a body having a mixing chamber and anoutlet, main fuel and air inlets to said mixing chamber, a throttlecontrolling said outlet, a rotatable hollow valve member, a pump,chamberI substantially in line withl said valvemember, a piston in saidpump chamber, `a reciprocable hollow piston rod carrying said piston andopening at its opposite ends `into said hollowgvalvegmember and'saidpump'` chamber, a port supplying liquid -fuel to said pump chamber,passages leadingrespectively from saidr hollow valve memberv to saidmixing chamber and to saidfoutlet, said valve member having portsadapted upon rotation of said member to alternately connectsaid passageswith said valve member, and means operable byopening movement of thethrottleto cause said piston to expel liquid fuel from said pumpchamber' through said hollow piston rod intogsaid hollow valve member.

f 15. A carburetor'fcomprising a body having-a member, a pump chambersubstantially in line with said valve member, a piston in said plumplchamber, a reciprocable hollow piston rod carrying said ypiston andopening at its opposite ends into said hollow valve memberand said pumpchamber, a port supplying liquid fuel to said pump chamber, passagesleading' respectively from sai'd hollow valve member to said mixingchamber and to said outlet, said valve member having ports adaptedupon'rotation of said mem- `ber to alternately connect said passageswith said valve'member, means operable by opening movement of thethrottlel to cause said piston to expel Vliquid fuel from said pumpchamber through said hollow piston rod into 'said hollow valve member,and an air supply port to said hollow valve member controlled byrotation of said valve member. 16. A carburetor comprising a body havinga mixing chamber and an outlet, main fuel and air inlets to said mixingchamber, a throttle controlling said outlet, a rotatable hollow valvemem- \ber, a pump chambersubs'tantially in line with said valve member,a piston in said pump cham'- ber, a reciprocable hollow piston rodcarrying said'piston and opening at its opposite ends into .saidhollowvalve member and said pump c hamber,a portq'supplying -li'quid fuel tosaidpump chamber. passagesleading respectively from said hollowvalve'niember to said mixing chamber and to said-outlet, said valvemember having ports adapted upon rotation of said member to alternatelyconnect said passages y with said valve member, meansV operable byopening movement `of the throttle to cause said piston to expel liquidfuel from saidr pump chamber'through. said hollow piston rodinto saidhollow valve member, an

air supply port'to said hollow valve member, and means operable bymovement of the throttle to control vsaid 'air supply port.

17. A":earburetor comprising a body havinga 115 mixing chamber and anoutlet, main. fuel and air inletsto said mixing chamber, athrottlecontrolling saidLoutlet, a rotatable hollow valve member, a pump`chambersubstantially in line with said valve member; a piston vin saidpump chamber, `a^120 reciprocable hollow piston rod carrying said .pis-

tong-and -openingat its opposite ends into ,said

I hollow valve member and said .pump chamber, a y port supplying'liquidfuel to said pump chamber, passages leading respectively from saidhollow valve member tosaid mixing chamber and tosaid outlet, said valvemember having ports adapted upon rotation of'said member to alternatelyconnect said passages-with said Valve member, means operable by4 openingmovement of the throttle 131) to cause said/.piston tof-expel liquidfuel from said pump chamber through said hollow piston rod intosaidhollow valve member, an admission port ,to said piston rodopened andclosed by movement of the throttle in-moving said rod, and ports con-135,

i 18.' A carburetor of the character described,

comprising avfbody member having a mixing chamber, main air and fuelinlets to said cham-14@ ber, an outlet from ysaid chamber, a casingcar'- ried by said member and having a. substantially verticalcylindrical bore therethrough,I a conduit opening into said bore andcommunicating withv said chamber, a fuel reservoir, a sleeve memberrotatably 'lxed in said bor'e anddepending into said reservoir, asubstantially horizontal'apertured partition-in saidjsleeve member, aplug/ member closing the bottom end of said sleeve f member and havingan aperture'therethrough for 15d lso . upon opening movement admittingf'uel from said'l reservoir, a piston in said sleeve member and having apiston rod extending upward through said partition aperture,

a passage extending through said piston and.

rod and opening into said sleeve above said partition, an air inlet tosaid bore, ports in said sleeve member registrable substantiallysimultaneously with said conduit and said second air inlet, means`carried by and movable with said rod and sealing the upper open end ofsaid sleeve member and operable to regulate said second air inlet, andan aperture in said sleeve member registrable with said conduit when aidsecond air inlet is closed.

19. A carburetor comprising a body having a mixing chamber andV anoutlet, main air and fuel inlets to said mixing chamber, a conduit forsupplying fuel to said fuel inlet, a throttle controlling said outlet, avalve casing having a passage discharging into said chamber on theposterior side of the throttle and a passage discharging into saidchamber on the anterior side of the throttle, a valve in said casinghaving aport cooperable with the first-named passage, said valve havinga plurality of ports cooperable with the second-named passage, andlmeans .for feeding fuel to said valve for distributionl through saidports, said ports being so related to said passages that the first-namedpassage is closed when the valve is actuated to register either of thesecondnamed ports with said second-named passage, and said second-namedpassage is closed when the first-named passage is in register with thefirstnamed port.

20. A carburetor of the character described, comprising a body having amixing chamber, air and fuel inlets to said chamber, an outlet from saidchamber, control means for said outlet, v means to supply fuel to saidoutlet beyond said control means, means to control said second-l namedmeans, and means operable by said'lastnamed means to regulate saidoutlet control means. v

21. A carburetor comprising a body having a lmixing chamber and anoutlet, main air and fuel inlets to said chamber, a throttle controllingsaid outlet, a liquid fuel reservoir, a fuel feed duct leading from saidreservoir to said outlet beyond the throttle, a valve controlling saidfeed duct, means for opening and closing said valve, and means on saidvalve and'operable to open the throttle when the valve is moved to openposition. l' 22. A carburetor comprising a body having a mixing chamberand an outlet, main air and fuel inlets to said chamber, a throttlecontrolling said outlet, a liquid fuel reservoir, a fuelfeed ductleading from said reservoir to said outlet beyond the throttle, a valvecontrolling said feed duct, means for opening and closing 'said valve,and a cam mounted on said valve and operable thereby thereof to open thethrottle. v Y

23. A carburetor comprising a body having' a mixing chamber and anoutlet, main fuel and air inlets to said mixing chamber, a throttlecontrolling said outlet, a fuel supply reservoir, fuel feed ductsleading respectively from-said reservoir to the mixing chamber and tothe -outlet beyond the close said ducts, and means operablein unisonwith said valve to open the throttle when the valve is operated to openthe feed duct tol the outlet `discharging beyond the throttle.

24. A carburetor comprising abody having a mixing chamber and an outlet,mainfuel and'air rinlets to said mixing chamber, a throttle controllingsaid outlet, a throttle operating shaft carrying a projection, ra.liquid fuel reservoir, a fuel feed duct leading from said reservoir tosaid outlet beyond the throttle, a rotary valve controlling said duct,means for operating said valve, and a cam operable by opening movementof said valveto engage said projection to operate said shaft to open thethrottle.

25. A.. carburetor comprising a body having a mixing chamber andanoutlet, main fuel and air inlets to said mixing chamber, a throttlecontrolling said outlet, a. rotatable hollow valve member, a pumpchamber, a piston in said pump chamber,

-a reciprocable hollow piston rod carrying said trolled by said valvemember for admitting air to lsaid valve member when the passage to themixing chamber is opened by operation of said valve member. n

26. A carburetor comprising a body having a mixing chamber and anoutlet, main air and fuel inlets to said mixing chambena throttlecontrolling said outlet, a valve casing having a passage leading to theposterior side of the throttle and a passage leading to the anteriorside of the throttle, a valvein said casing having a port cooperablewith the first-named passage, said valve having a plurality of-portscooperable with the second-named passage, means for feeding fuel to saidvalve for distribution through said ports, said ports being so relatedto said passages that the first-named port is out olf when the valve isactuated to register either of the second-named ports with saidsecond-named passage, and said second-named passage is closed when thefirstnamed passage is in register with the first-named port, and pumpmeans for feeding fuel to certain of said ports.

27. A,carburetor comprising a body having a passage therethrough, a fuelsupply conduit discharging into said passage, a throttle controlling nowthrough said passage, a liquid fuel reservoir, a fuel feed'duct leadingfrom said reservoir and discharging into said passage, a valvecontrolling said feed duet, means to open said valve, a cam operableupon opening movement of said valve, cooperable operating means betweensaid cam and said .throttle for moving said throttle toward openposition upon operation of said cam, and means for moving said throttletoward open position irrespective of the position of said cam.

' 28, 'A carburetor comprising a body having a passage therethrough,means to supply fuel to said passage, a throttle controlling saidpassage, a fuel supply reservoir, fuel feed ducts leading from saidreservoir to longitudinally spaced points in said passage, valve meanscontrolling said ducts. means for operating said valve means toalternately control said ducts to permit fuel discharge therethrough,cam ,means operable by said valve means, and cooperable operating meansbetween means acting on saidl operating means when one of said ducts isdischargeable into said passage to move said throttle toward openposition and acti Open.

ing when another of said ducts is dischargeable into said passage tomove said throttle further 29. A carburetor of thecharacter described,

'comprisinga body member having a mixing chamber with a mixture outlet,main air and fuel in-J lets to said chamber, a priming fuel supplyconduit opening into said outlet and connected to a source of fuel fordischarging priming fuel into said outlet in response to engine suction,a normally closed valve in said conduit, means to control ow from saidchamber to said outlet, and means operable by said control means toforce fuel through said conduit into said outlet when said valve isopen.

30. A carburetor of thelcharacter described, comprising a \body memberhaving `a -mixing chamber with a. mixture outlet, main air and fuelinlets to said chambey, a conduit to supply supplemental fuel to saidchamber, a normally closed conduit to supply priming fuel to saidoutlet, valve` means to contiol said first-named conduit and to open andclose said second-named conduit, means to supply`economizing air to saidchamber, means to control flow from saidachamber, and means operable bysaid fl'o'w control means to force fuel through one of said conduits andto regulate said air supply means. Y

31. A carburetor .of the character described, comprising a body memberhaving a mixing chamber, main air and fuel inlets to said chamber, athrottle controlled outlet from said chamber, a pump chambenhaving apiston therein,

means to supply fuel to said pump chamber, a`

conduit between said, chambers, an air inlet port to said conduitnormally operable to supply air to satisfy the mixing chamber suctionthereon, means to regulate said air port to cause sub-at- .mosphericpressure in said conduit whereby the mixing chamber suction will drawfuel from said pump chamber, means connecting said lastnamed means andsaid piston, and throttle operi said valve member registerable with saidconduits for placing said conduits in communication with said uidchamber, andl throttle operated means to supply fuel to said fluidchamber. f v

33. AA carburetor of the character described,

comprising a body member having a mixing chamber, main air and fuelinlets .to said 'chamber, a throttle controlledoutlet from lsaidchamber, a casing-member having a cylindrical bore,- a valve memberrotatable in said bore and hav--l ing a iiuid chamber, a conduit leadingfrom said bore to said mixing. chamber, a' conduit leading kfrom saidbore to said outlet,*an air inlet 'l conduit to said bore, ports in saidvalve member registerable with said conduits for placing said conduitsin communication with said u'idch'ambe'r, means to supply fuel tosaidpuid chamber, means to control the port registering with air inlet,

and throttle controlled means to regulate the port registeringv withsaid air inlet, said second-named and said third-named means beingoperable to control the degree of air pressure in said fluid chamber.

second-named passage, means for feeding fuel to said valve fordistribution'through said ports,

.said ports being so related to said passages that the first-named portis cut oi when the valve is actuated to register either of thesecond-named ports with said second-named passage, and said vmisecond-named passage is closed when the first- *named passage is inregister` with the first-named port, and throttle operated pump meansforfeeding fuel to certain Aof said passages.

35. A carburetor of the character described, comprising a body memberhaving a passageway therethrough with anair inlet, a vane membernormally restricting the passage ofy air through said passageway, areciprocably supported fuel nozzle discharging into said passageway,means interconnecting said vane member and said nozzle whereby movementof ysaidfvane member will move said nozzle-means operable in responset0' movement of said nozzle to regulate flow of fuel' therethrough, a'fuely reservoir connected to` said .nozzle to supply fuel thereto', acasingmember having a dash-pot chamber, said dash-pot chamber receivingliquid fuel from the supply to said nozzle, and a piston in saiddash-pot chamber,

and connected to said nozzle for movement therewith and thereby, thepiston in said dash-pot chamber drawing liquid fuel into and dischargingliquid fuel from said Ydash pot chamber upon reciprocation of saidnozzle whereby to regulate the movement of said nozzle.

36. A carburetor of the character describedy comprising a body memberhaving a passageway therethrough with an air-inlet, a vanemembernormally restricting the passage of air through said passageway, areciprocably supported fuel nozzle discharging into said` passageway,lmeans interconnecting said vane memberand said nozzle whereby movementof said vane member will moveY said nozzle, means operable in responseto movement of said nozzle to regulate flow of fuel therethrough, a fuelreservoir connected to said nozzle to supply fuel thereto, a casingmember having a dash-lpot chamber, said dash-pot chamber receivingliquidv fuel from the supply `to said nozzle, a piston in said dash-potchamber and connected by, the piston in said dash-pot chamber drawingliquid fuel into and discharging liquid fuel from` said dash-pot chamberupon reciprocation of said nozzle whereby to regulate the movement ofsaid nozzle, andresilient means opposing movement of saidvane membertoward passageway opening position. a? Y 37. A carburetor lof thecharacter described, comprising a body member having a passagewaytherethrough with an air inlet, a vane member normally restricting thepassage of air through 185` i, t0 Said nozzle for movement therewith andtherev saidpassageway, a reciprocabl-ysupported fuel.'

nozzle discharging into lsaid passageway, means interconnecting saidvane member and saidnozzle whereby movement of said vane member willmove by, the piston in sai'cl dash-pot chamber drawing said nozzle,means operable in response to moveliquid fuel into and dischargingliquid fuel from ment of said nozzle to regulate ow of fuel theresaiddash-pot chamber upon reciprocation of through, a. fuel reservoirconnected to said nozzle said nozzle whereby to regulate the movement ofto supply fuel thereto, a casing member having a said nozzle, andresilient means in said dash- 80 dash-pot chamber, said dash-pot chamberrepot chamber opposing' movementl of said piston ceiving liquid fuelfrom the supply to said nozzle, in response to movement of said vanemember a piston in said dash-pot chamber and connected toward passagewayopening position.

to said nozzle for movement therewith and there- WALTER H. WEBER. 1,0 y

CERTIFICATE or CORRECTION.

Patent No. 1,981,483. v November 20. 1934.

WALTER H. WEBER,

It is Ihereby certified that error appears in the printedspecificatioriof the. above .numbered patent requiring correction asfollows: Page 4, line 124, for straining read starting; and page 5, line100, for "passages" readvpasszige; and tharf'the said Letters Patentshould be. read wth'these corrections therein that the samemay conformto the record of the case in the Patent Office.

Signed and sealed this 27th day of Augst, D. 1935.

Lesl ie Frazer (Seal) Acting Commissioner of Patents.

whereby movement of said vane member will move by, the piston in sai'cldash-pot chamber drawing said nozzle, means operable in response tomoveliquid fuel into and discharging liquid fuel from ment of saidnozzle to regulate ow of fuel theresaid dash-pot chamber uponreciprocation of through, a. fuel reservoir connected to said nozzlesaid nozzle whereby to regulate the movement of to supply fuel thereto,a casing member having a said nozzle, and resilient means in said dash-80 dash-pot chamber, said dash-pot chamber repot chamber opposing'movementl of said piston ceiving liquid fuel from the supply to saidnozzle, in response to movement of said vane member a piston in saiddash-pot chamber and connected toward passageway opening position.

to said nozzle for movement therewith and there- WALTER H. WEBER. 1,0 y

CERTIFICATE or CORRECTION.

Patent No. 1,981,483. v November 20. 1934.

WALTER H. WEBER,

It is Ihereby certified that error appears in the printedspecificatioriof the. above .numbered patent requiring correction asfollows: Page 4, line 124, for straining read starting; and page 5, line100, for "passages" readvpasszige; and tharf'the said Letters Patentshould be. read wth'these corrections therein that the samemay conformto the record of the case in the Patent Office.

Signed and sealed this 27th day of Augst, D. 1935.

Lesl ie Frazer (Seal) Acting Commissioner of Patents.

